I am very please with most of the animals. The narwhal in the loading screen looks fabulous!! The only problems I have are:
1. The whale shark is benthic!! The benthic zone is the bottom of the ocean, where there is NO light except bioluminescent light!! It eats phytoplankton and krill - both of which inhabit the littoral zone! Because of the lack of light, no plankton/krill can live at these great depths!!! Whale sharks would starve to death if they lived in the benthic zone. They should be pelagic, and they even wander into coastal and reef regions.
2. Again a problem with biomes, the great white shark lives in coastal zones - quite the opposite of the benthic zone!
Other than this I am very bpleased with all the other animals, particularly the walrus and sea lion. I also cannot wait for the manatee, but I must admit it's skin looks very odd in the loading screen, I hope it looks better in the real game!